Theubiquitous THX logo has been seen on a
profusion of audio and video
product for decades. Yet many wonder,
what is
THX?THX
is
simply a standard
that manufacturers and installers must meet to be certified by THX. THX was
originally a division of Lucasfilm, but now an independent company. THX
is not a standardsuch
as Dolby or DTS. Yet
THX does
outline minimum specifications
for amplifiers and speakers such as flat frequency response, low
distortion, and low noise. In addition, THX makes the
following assumptions:

Movie
soundtracks are mixed with a mid-range boost that causes harsh sounding
playback in a home theater.

Acoustical
reflections from the floor and ceiling smear sound fields and distort
the mid and higher frequencies.

Forthe larger room with many rows of
seating consider a horn speaker
design.
Though this is not THX prescribed; a mid/tweeter horn array
can broaden mid/high frequency dispersion width from
the front row to the last. However, this design will also
sacrifice
optimum performance at the focal
point of the room, which might be
your seat.
In
any case, if you accept THX assumptions and concur with their
solutions, then this is your design choice.